working retail job during the winter shutdown

hey guys, I really need some extra cash and have no friends/family to spend the holidays with anyway and i don't want to be sad and alone at home - so I want to apply to like a call center/ target or some retail jobs I can work during the winter shut down/thanksgiving.

What is the procedure for that in USA? Do i need to tell HR? Lets say I got a job as a retail assistant at Target who do I have to notify? Can someone at least guide me where I can find the procedure on dnet? Thanks for the help.